1904.] NATURAL SCIENCES OF PHILADELPHIA. 25 



conclusion borne out by the specimens before me. Mr. Hirase has 

 sent Amalthea conica from Riukiu, Hirado, Hizen, and Fukura, Awaji. 

 I am unable to see any differences between the shells of this species 

 from South Australia. Japan, Mauritius, etc. Though individually 

 variable, there seems to have been no racial differentiation. Tryon 

 adds the following names to the synonymy of this species : Hipponyx 

 acutus and suturalis Q. and G., cornucopicea Hutton, orientalis Dufo. 



CERITHIID^. 

 Cerithium trailli kikaiensis n. subsp. PI. IV, fig. 38. 



Shell with the lateral outlines nearly straight above, convex in the 

 lower half; cream-white, sparsely dotted with brownish-yellow on the 

 spiral threads, and with beads of dull violet sparsely and irregularly 

 scattered along the spiral cords. 



Sculpture of three rather weakly tuberculate spiral cords on each of 

 the intermediate whorls of the spire, the upper one close to the suture, 

 the intervals between them spirally striate, there being about 4 threads 

 in each interval, the median one largest. The upper whorls have alter- 

 nate cords and threads, crossed by close longitudinal waves. On the 

 last whorl there are about 8 principal tuberculate cords, the intervals 

 finely, unevenly striate. The later whorls have swollen varices at 

 intervals of about half a whorl, but they become closer above, about 

 one-third of a volution apart. Whorls about 10. The aperture is 

 ovate, with a sinus above defined by a cord on the inner lip. The outer 

 lip is strengthened by a small varix, and is sulcate within, there being 

 usually a pair of lirae between the terminations of two spiral cords of 

 the exterior. The throat is smooth and white, showing some blackish 

 dots through. The basal channel is very short and oblique. -The inner 

 lip is coated with a rather thick deposit of a deep purple color. 



Length 15, diam. 7 mm. 



Kikaiga-shima, Osumi. Types No. 86,001, A. N. S. P., from No. 

 1,503 of Mr. Hirase's collection. 



Compared with C. trailli Sowb. from Singapore, this is a very much 

 smaller form, paler, with more numerous varices and a purple columella. 



Cerithium subscalatum n. sp. PL IV, fig. 39. 



Shell small, turrite; brown, the spiral cords paler, the intervals 

 darker. Sculpture of longitudinal waves or folds, about 12 on the 

 penultimate whorl, and with one rounded varix on the last whorl oppo- 

 site the aperture. The folds do not extend below the periphery on 

 the last whorl, where they are also much weaker. Spiral sculpture 

 of many crowded, smooth cords, three of which are larger, two near 



